django cbv

django 提供了一系列现成的类视图，他们都继承自一个 View 基类（django.views.generic.base.View）。在这个基类里实现了与 URLs 的接口（as_view）、请求方法匹配（dispatch）和一些其他的基本功能。比如 RedirectView 实现了一个简单的 HTTP 重定向，TemplateView 给 View 添加了一个渲染模板的功能。

简单用法：

from django.conf.urls import patterns
from django.views.generic import TemplateView

urlpatterns = patterns('',
    (r'^about/', TemplateView.as_view(template_name="about.html")),
)

子类化通用视图，

一个 AboutView，他覆盖了 TemplateView 的模板属性和获取 Context 方法（这是使用 TemplateView 的一般做法）：

from django.views.generic import TemplateView

class AboutView(TemplateView):
    template_name = "about.html"
    
    def get_context_data(self, **kwargs):
        context = super(AboutView, self).get_context_data(**kwargs)
        #alter context 
        return context

ListView:

from django.views.generic import ListView
from books.models import Publisher

class PublisherList(ListView):
    model = Publisher

它会自动去寻找publiser_list.html页面作为模板，并在里面渲染{{publisher_list}}作为变量.

对数据模型进行筛选：

from django.views.generic import ListView
from books.models import Book

class BookList(ListView):
    queryset = Book.objects.order_by('-publication_date')
    context_object_name = 'book_list'

如果要进行传参的话：

# urls.py
from django.conf.urls import patterns
from books.views import PublisherBookList

urlpatterns = patterns('',
    (r'^books/([\w-]+)/$', PublisherBookList.as_view()),
)

# views.py
from django.shortcuts import get_object_or_404
from django.views.generic import ListView
from books.models import Book, Publisher

class PublisherBookList(ListView):

    template_name = 'books/books_by_publisher.html'

    def get_queryset(self):
        self.publisher = get_object_or_404(Publisher, name=self.args[0])
        return Book.objects.filter(publisher=self.publisher)

保存时候的小动作：

# models.py
from django.db import models

class Author(models.Model):
    salutation = models.CharField(max_length=10)
    name = models.CharField(max_length=200)
    email = models.EmailField()
    headshot = models.ImageField(upload_to='author_headshots')
    last_accessed = models.DateTimeField()

#URLConf

from django.conf.urls import patterns, url
from books.views import AuthorDetailView

urlpatterns = patterns('',
    #...
    url(r'^authors/(?P<pk>\d+)/$', AuthorDetailView.as_view(), name='author-detail'),
)

#View

from django.views.generic import DetailView
from django.utils import timezone
from books.models import Author

class AuthorDetailView(DetailView):

    queryset = Author.objects.all()

    def get_object(self):
        # Call the superclass
        object = super(AuthorDetailView, self).get_object()
        # Record the last accessed date
        object.last_accessed = timezone.now()
        object.save()
        # Return the object
        return object

#Model

def get_absolute_url(self):
    return reverse('student:systemMessageDetail', args=[self.pk])

包含post,get方法：

from django.http import HttpResponse
from django.views.generic import View

class MyView(View):
    def get(self, request):
        # <view logic>
        return HttpResponse('result')

一个简单的contact form

# forms.py
from django import forms

class ContactForm(forms.Form):
    name = forms.CharField()
    message = forms.CharField(widget=forms.Textarea)

    def send_email(self):
        # 使用 self.cleaned_data 字典来发送一封邮件
        pass

# views.py
from myapp.forms import ContactForm
from django.views.generic.edit import FormView

class ContactView(FormView):
    template_name = 'contact.html'
    form_class = ContactForm
    success_url = '/thanks/'

    def form_valid(self, form):
        # 当有效的数据被 POST 进来以后，本方法就会被调用
        # 本方法应当返回一个 HttpResponse.
        form.send_email()
        return super(ContactView, self).form_valid(form)

转载自http://www.pythontip.com/blog/post/12172/

 一个简单的view